<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/admin/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
        <!-- 提示区域 -->
        <el-alert title="添加商品信息" type="info" center show-icon :closable="false">
        </el-alert>
        <!-- 步骤条区域 -->
        <el-steps :space="200" :active="activeIndex - 0" align-center finish-status="success">
            <el-step title="基本信息"></el-step>
            <!-- <el-step title="商品参数"></el-step>
            <el-step title="商品属性"></el-step> -->
            <el-step title="商品图片"></el-step>
            <el-step title="商品内容"></el-step>
            <el-step title="完成"></el-step>
        </el-steps>
        <!-- tab栏 -->
        <el-form :model="addFrom" :rules="addFromRules" ref="addFromRef" label-width="100px" label-position="top">
          <el-tabs v-model="activeIndex" :tab-position="'left'"
          :before-leave="beforeTabLeave">
            <el-tab-pane label="基本信息" name="0">
              <el-form-item label="商品名称" prop="name">
                <el-input v-model="addFrom.name"></el-input>
              </el-form-item>
              <el-form-item label="商品价格" prop="price">
                <el-input type="number" v-model="addFrom.price"></el-input>
              </el-form-item>
              <el-form-item label="商品重量" prop="weight">
                <el-input type="number" v-model="addFrom.weight"></el-input>
              </el-form-item>
              <el-form-item label="商品数量" prop="number">
                <el-input type="number" v-model="addFrom.number"></el-input>
              </el-form-item>
              <el-form-item label="商品分类" prop="cate">
                <el-cascader
                  v-model="addFrom.cateId"
                  :options="catelist"
                  :props="{ expandTrigger: 'hover',
                            label: 'name',
                            value: 'id',
                            children: 'children' }"
                  @change="handleChange"></el-cascader>
              </el-form-item>
            </el-tab-pane>
            <!-- <el-tab-pane label="商品参数" name="1">商品参数</el-tab-pane>
            <el-tab-pane label="商品属性" name="2">商品属性</el-tab-pane> -->
            <el-tab-pane label="商品图片" name="1">
              <!-- action: 图片要上传到的后台API地址 -->
              <el-upload
                action="http://localhost:8888/product/upload"
                :on-preview="handlePreview"
                :on-remove="handleRemove"
                list-type="picture"
                :headers="headerObj"
                :on-success="handleSuccess"
                accept="image/jpeg,image/jpg,image/png">
                <el-button size="small" type="primary">点击上传</el-button>
                <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过5M</div>
              </el-upload>
            </el-tab-pane>
            <el-tab-pane label="商品内容" name="2">
              <!-- 富文本编辑器 -->
              <quill-editor v-model="addFrom.description"></quill-editor>
              <!-- 添加商品的按钮 -->
              <el-button type="primary" class="btuAdd" @click="add">添加商品</el-button>
            </el-tab-pane>
          </el-tabs>
        </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previewVisible"
      width="50%">
      <el-image :src="previewPath"></el-image>
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'

export default {
    data() {
        return {
            activeIndex: 0,
            // 添加商品的表单数据对象
            addFrom: {
              name: '',
              price: 0,
              weight: 0,
              number: 0,
              // 商品所属分类数组
              cateId: [],
              // 图片的数组
              picture: [],
              // 商品的详情描述
              description: ''
            },
            addFromRules: {
              name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
              price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
              weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
              number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
              cateId: [{ required: true, message: '请选择商品分类', trigger: 'blur' }]
            },
            // 商品分类列表
            catelist: [],
            // 上传图片的URL地址
            uploadURL: 'http://localhost:8888/upload',
            // 图片上传组件的headers请求头
            headerObj: {
              Authorization: window.sessionStorage.getItem('token')
            },
            previewPath: '',
            previewVisible: false
        }
    },
    created() {
      this.getCateList()
    },
    methods: {
      // 获取商品分类数据
      async getCateList() {
        const { data: res } = await this.$axios.get('/product-categories/selectProduct',
        { params: { type: 2 } })
        if (res.code !== 200) {
          return this.$message.error('获取商品分类数据失败')
        }
        this.catelist = res.data.prolist
      },
      // 级联选择器选中选项变化，会触发这个函数
      handleChange() {
        console.log(this.addFrom.cateId)
        if (this.addFrom.cateId.length !== 2) {
          this.addFrom.cateId = []
        }
      },
      beforeTabLeave(activeName, oldActiveName) {
        if (oldActiveName === '0' && this.addFrom.cateId.length !== 2) {
          this.$message.error('请先选择商品分类 ')
          return false
        }
      },
      // 处理图片预览效果
      handlePreview(file) {
        console.log(file)
        this.previewPath = file.response.data.url
        this.previewVisible = true
      },
      // 处理移除图片的操作
      handleRemove(file) {
        console.log(file)
        // 获取图片的临时路径
        const filePath = file.response.data.tmp_path
        // 从pics数组中，找到这个图片对应的索引值
        const i = this.addFrom.picture.findIndex(x => x.picture === filePath)
        // 调用splice方法，把图片信息对象，从pics数组中移除
        this.addFrom.picture.splice(i, 1)
        console.log(this.addFrom)
      },
      // 监听图片上传成功的事件
      handleSuccess(response, file, fileList) {
        console.log(file + '图片数据：' + response)
        // 拼接得到一个图片信息对象
        const picInfo = { picture: response.data.tmp_path, pictureUrl: response.data.url }
        this.addFrom.picture.push(picInfo)
        console.log(this.addFrom)
      },
      add() {
        this.$refs.addFromRef.validate(async valid => {
          if (!valid) {
            return this.$message.error('请填写必要的表单项')
          }
          const form = _.cloneDeep(this.addFrom)
          // 执行添加的业务逻辑
          form.cateId = this.addFrom.cateId[1]
          console.log(form)
          const { data: res } = await this.$axios.post('/product/add', form)
          console.log(res)
          if (res.code !== 200) {
            return this.$message.error('添加失败')
          }
          this.$message.success('添加成功')
          this.$router.push('/admin/goods')
        })
      }
    }
}
</script>

<style lang="less" scoped>
.btuAdd {
  margin-top: 15px;
}
</style>
